Write a program that reads digits and composes them into integers. For example, 123 is read as the characters 1, 2, and 3. The program should output 123 is 1 hundred and 2 tens and 3 ones. The number should be output as an int value. Handle numbers with one, two, three, or four digits. Hint: To get the integer value 5 from the character '5' subtract '0', that is, '5'–'0'==5.